QUANTITATIVE-EVALUATION OF GALLIUM-PHOSPHIDE SAMPLES PREPARED FROM RAPID SOLID-STATE METATHESIS - SOLID-STATE P-31 AND GA-69 MAGIC-ANGLE-SPINNING NMR STRATEGIES

Quantitative solid state nuclear magnetic resonance (NMR) techniques a re capable of evaluating the crystalline quality of III-V semiconducto r preparations. To this end, an analytical protocol consisting of magi c angle spinning lineshape analysis, spin counting studies, and quadru polar nutation NMR has been established, allowing sample comparisons o n a numerical scale. This protocol is applied to a suite of gallium ph osphide (GaP) samples prepared by a novel rapid solid state metathesis route from gallium halide and sodium phosphide. The results show that the quality and crystallinity of the GaP product phase depends sensit ively on the gallium halide precursor used, with GaF3 resulting in the highest-quality material.